1#ifndef _ASM_PAGE_H 2#define _ASM_PAGE_H 3 4#include <asm/virtconvert.h> 5#include <asm/mem-layout.h> 6#include <asm/sections.h> 7#include <asm/setup.h> 8 9#ifndef __ASSEMBLY__ 10 11#define get_user_page(vaddr) __get_free_page(GFP_KERNEL) 12#define free_user_page(page, addr) free_page(addr) 13 14#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) 15#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) 16 17#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) 18#define copy_user_page(vto, vfrom, vaddr, topg) memcpy((vto), (vfrom), PAGE_SIZE) 19 20/* 21 * These are used to make use of C type-checking.. 22 */ 23typedef struct { unsigned long pte; } pte_t; 24typedef struct { unsigned long ste[64];} pmd_t; 25typedef struct { pmd_t pue[1]; } pud_t; 26typedef struct { pud_t pge[1]; } pgd_t; 27typedef struct { unsigned long pgprot; } pgprot_t; 28typedef struct page *pgtable_t; 29 30#define pte_val(x) ((x).pte) 31#define pmd_val(x) ((x).ste[0]) 32#define pud_val(x) ((x).pue[0]) 33#define pgd_val(x) ((x).pge[0]) 34#define pgprot_val(x) ((x).pgprot) 35 36#define __pte(x) ((pte_t) { (x) } ) 37#define __pmd(x) ((pmd_t) { (x) } ) 38#define __pud(x) ((pud_t) { (x) } ) 39#define __pgd(x) ((pgd_t) { (x) } ) 40#define __pgprot(x) ((pgprot_t) { (x) } ) 41#define PTE_MASK PAGE_MASK 42 43#define devmem_is_allowed(pfn) 1 44 45#define __pa(vaddr) virt_to_phys((void *) (unsigned long) (vaddr)) 46#define __va(paddr) phys_to_virt((unsigned long) (paddr)) 47 48#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 49 50extern unsigned long max_low_pfn; 51extern unsigned long min_low_pfn; 52extern unsigned long max_pfn; 53 54#ifdef CONFIG_MMU 55#define pfn_valid(pfn) ((pfn) < max_mapnr) 56#else 57#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) 58#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn) 59 60#endif 61 62#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 63#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 64 65 66#define VM_DATA_DEFAULT_FLAGS \ 67 (VM_READ | VM_WRITE | \ 68 ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ 69 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 70 71#endif /* __ASSEMBLY__ */ 72 73#include <asm-generic/memory_model.h> 74#include <asm-generic/getorder.h> 75 76#endif /* _ASM_PAGE_H */ 77